UE Uplink Buffer Feedback for Data Beyond the Packet Delay Budget
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Solution Overview
Problem
Uplink signals in wireless communications systems often exceed packet delay budgets, leading to redundant data transmissions that waste resources and increase UE power consumption, particularly in applications like extended reality (XR) where late data is not beneficial.
Innovation Solution
A method and apparatus for determining late data in a buffer and generating a control signal to inform the network, allowing the UE to discard such data and reallocating resources, thereby improving network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits all buffered uplink data within allocated time, then data completeness is improved, but power consumption increases and network resources are wasted when data exceeds packet delay budget
Solution Approach 1:
The patent changes the parameter of data transmission status by introducing a new indicator (e.g., bit in MAC CE or BSR) that signals to the network when buffered data exceeds the packet delay budget. This allows the UE to adjust its transmission behavior dynamically, avoiding unnecessary power consumption for transmitting obsolete data while maintaining reliability for timely data.
Solution Approach 2:
The patent implements a feedback mechanism where the UE informs the network about the status of buffered data (whether it exceeds PDB or not) through control messages. This feedback enables the network to make informed scheduling decisions, allocating resources only when data transmission is still beneficial, thus reducing UE power consumption without compromising data completeness when needed.
2Reliability
If the UE transmits all buffered uplink data, then data completeness is improved, but network resource efficiency deteriorates due to redundant transmissions of late data
Solution Approach 1:
The patent introduces a new parameter indicator in uplink control messages that changes based on whether buffered data exceeds the packet delay budget. This parameter change enables the network to distinguish between useful data transmissions and redundant ones, improving network resource efficiency by allocating resources only when data is still within its delay budget.
Solution Approach 2:
The patent implements feedback from UE to network about data freshness status. This feedback loop allows the network to adapt its resource allocation strategy, avoiding assignment of uplink resources when data has already exceeded its delay budget, thereby eliminating redundant transmissions and improving overall network productivity.
3Reliability
If the network allocates resources for all buffered data, then data transmission completeness is improved, but resource allocation efficiency deteriorates due to late data
Solution Approach 1:
The patent applies preliminary action by having the UE proactively indicate in advance whether its buffered data exceeds the packet delay budget, before the network makes resource allocation decisions. This allows the network to pre-filter out unnecessary resource allocations for late data, improving resource allocation efficiency without compromising transmission completeness for timely data.
Solution Approach 2:
The patent implements feedback mechanism where UE provides status information about its buffered data to the network. This feedback enables the network to make faster, more accurate resource allocation decisions by knowing in advance which data transmissions are still beneficial, reducing the time spent on allocating resources that would ultimately be wasted.
Data Source
AI summary
Various aspects of the present disclosure relate to a UE configured to determine that first data stored in the memory for an uplink transmission is not suitable for subsequent uplink scheduling based on a criterion, and trigger the transmission of a control message that indicates an amount of the first data that will not be provided in an uplink transmission.